Cable clamp



July 2o, 1926. 1,593,069

F. W. GRISWOLD CABLE CLAMP 9 11:1., Filed Dec.15. 1924 l Nmnmk Fg e @I lI /Z /0 [MZ l Patented July 20, 1926.

UNIT El) ST A T ES FRANK XV. GRISWLD, OF MNNEAPOLS, MINNESCTA.

CABLE CLAMP.

Application VfiledDecember 13, 1924. Serial No. 755,659.

rllhis invention relates to a clamp and parltio-ularlv to aclainpadapted to clamp a cable 'su'l1 A1s the rWellvknoivn twisted Wire cable.lil vle theclainpotlthepresent invent-ion may be usedto-.clanip varioustypes of cables it is Eparticularly designed .to Vclamp a cable havingpassingthrough the center thereof one or more lexible-f1nembers so thata passage is afforded for saidfineinbers through 4the clamp. -Oneparticular use of thefclamp has been for securinga cable forming partota,tensioningvnieans t'or a signal post, which, post has-a. bail at, itsbase supported- ;upon suita bleA members and i which adaptedtofsivingtlaterally in all `directions. `It. isneCessaryt-o,haveelectrical conductors passi-ng :into the postaand ;qi iite a problemwas presented in yarranging these conductors sothat the-same wouldnot-be chat-ed by; the cla-inpingof the Vcable andthe swinging movementof the post. A special cable was therefore niade having-a passagethrough thegoenteiu'thereof in which the conductors avererl-isposedandthe present cla-mp has been usedlto clalnpsuch a cable.

It is an objectfof this invention, therelfore, lto provide a clampcomprising a plurality offniembers adaptedtobesecured tof etl-ier` whichlnenjibers ,are formed to have a passage :therethrough Iwhen f sosecured together in .which-a cable is clamped.

yIt isanot-her obect of theinvention:to .provide Suche clamp as setforth Vin the preceding ,paragraph in which the inenibers .forming theclamp Ihavelaterally projecting` l portions co-operating' on their`lower sides to forniva substantiallyannular surface, together withamember yadapted to be connecteditosaid -inen'ibers opposite saidsurt'ace and to clainpthe separated and dii' g ing; strands of thecableagainst said sur'l'acc.

It isf-another object-oi the invention vto provide a clanip comprising apluraliti7 ot' members having` ineansfor connecting and c-lfanjiping the.ame in assembled position `which members have a passage. therethroughin ywhich the cable -is:o.la1,1'1pediand which `also havevnieansforclamping the .separated Aand L diverging strands of the cable.

1t v'is-still flirt-hermanobject olfthe `invention to provide LaIcla-nip A.comprising f a plurality of meijnbers adapted to-besecuredro'r -clamped together and having a pass-age Alhemetliroiig'hin which the @able isiclainped,

ftogether .with a inenibcrmdapted to :be secured or clamped to saidmembers for a pluralita7 ot stra-nds airain clamping 'the individualstrands of the cable, which latter ineinber is provided With a bail.

These and other objects and advantages ol the invention will be fullyset forth in the Afollowing description made in connec- .tion With theaccompanying drawings in W rich like reference characters refer to thesaine parts throughout vthe diiierent views, and in which, i

Fig. l is a vie-iv in sideelevaton o t' the clamp showing. a portion oitthe cable thereinv and the conductors eine said. cable Fig. i2 is a topplan view of the lower memberl the clamp;

Fig. 3 is a. central vertical section .taken on theline Ji-Soi: Figi;

l is a bottoni plan vieiv of the-clamp -ivith the lower nieinber removedshowingi the strandsot the cable inplace fand F is a central verticalsection taken on theline oiiilig.

Referring to lthe drawings,:thefclanipis shown as comprising apluraiity'ol: nielnbers {hwvhich .inenihersare illustrated tivo innu-inber, each ofavhich has a central senncylindrical portion 6a with asemi-cylindrical passage therethroughD and each oi' which has` asemi-circular tianlsre portion .6 at vone end projecting` laterallyvsuhstantiail)7 at right angles to the axis of the Vseini-cylin dricalportion Gn. The iiange portions 6b have Hat surta-ces at one sidedisposed in a plane at right angles to the axisof the portionu and haveinclined surta-ces (5C at their outer sides, which latter surfaces tornisul;- stantially a concave frustoeconical surface. The ineinbers G alsohave projecting.latern ally thereironi along vthe portions fiat liangesU1 apcrtiired to receive headedand nuttod clamping and securing bolts?.The clamp mirticularlv desi ed to clainp a cable 8 oit the-twistediviretj-.fpe coii'iprisingl M d in twisted or helical formati-on, eachof which comprises a plurality oi strands of ivirearrangjed in twistedor helical formation. The inenibers (i, when secured together, have asubstantially cylindrical passage extending' therethrough andthe-surface of this passage preferably is formed ivith helical grooves(5 adapted to lit the strands of cable 8. will be noted that the cable 8has no center strand but is tornied with a passage tlfierethrough inwhich are disposed a plurality of insulated electrical Wires or conduitsi9.

lll() a member l() of a central passage The clamp also comprises annularform, thus haring therein and one side of this member is formed with aconvex' truste-conical surface l0 corresponding to the surface and aranged in opposite relation to said sui" face. The member l0 is of thesaine diameter as the lia portion G" and said member and said ngeportions are provided with a pluralityr of alining holes adapted toreceive Ythe headed and nutted clamping bolts il which secure the member'iO to the flanges 6l. The surfaces GC and l0 are provided with radialgrooves i2 and the grooves are each provided 'ith depressions l2 formingridges or ribs therebetween. The member l() is also provided with a bailor loop member Vi0" substantially of U-shape, which spans the centralopening therein.

The portions 6 of the clamp are adapted to surround and clamp the bodyof the able 8, as illustrated in Fig. l and, as stated, the grooves 6ewill substantially lit the twisted strands of the cable. The strands ofthe cable are separated and arranged into grooves l2, as clearly shownin Figs. l and 4, and these separated and diverging strands are clampedbetween the flanges (ib and the member 10. wWith this clampingarrangement, the conductors 9 are free to pass through the clamp andpass out through the central opening in the member l0 to a desiredlocation where they will be connected to asource of current. In theparticular use of the device with a signal post the cable S passesupward into the post where it is clamped and the conductors 9 extendupward to the lamps in the post. The cable in said use is placed undergreat tension by strong springs and the same is anchored at the bottomby the bail member l0", being disposed over a suitable hook firmlysecured in the base. The cable is so constructed that the clampingpressure thereon does not affect the opening therethrough and by theclamping effect on the body of the cable and also on the separatedstrands the cable is very eliieiently secured. k

It will thus be seen that the conductors 9 will not be chafed orinterferred with .by anv swinging movements of the cable.

From the above description it is seen that applicant has provided asimple and very eliicient form of clamping device and one which willvery etl'ectively clamp such a cable as disclosed and at the same timepcrmit passage of Hexible members therethrough. The device is of simpleconstruction and easily made and assembled. The same has been amplydemonstrated in actual use and is being used connnercially in largenumbers.

It will, of course be understood that various changes may be. made inthe form, details, arrangement and proportions of the parts withoutdeparting from the scope of applicants invention, which, generallystated, consists iii a` device cable of accomplishing the objects aboveset forth, in the novel parts and combinations of parts disclosed anddelined in the appended claims.

TiVhat is claimed is:

1. A clamp for a cable having in combination, a plurality of membersadapted to be secured together, each having means engaging and clampingthe side of a cable and each having means disposed at an angle to saidiirst mentioned means for engaging the separated and diverging strandsof said cable, and an annular means (3o-operating with said lastmentioned means and adapted to be clamped to said members for clampingthe diverging strands of said cable.

2. A clamp for a cable comprising a pluralityof members adapted to besecured together and having a substantially cylindrical passagetherethrough when so secured adapted to receive a cable clamped by saidmembers, said members also having laterally projecting portions at oneend forming an annular surface, and a member having a passagetherethrough alining with said pas sage and having a surface oppositethe said last mentioned surface and co-operating therewith to clamp theindividual strands of said cable.

3. A clamp for a cable having in combination, a plurality of memberseach having a cylindrical trough extending longitudinally thereof andhaving flanges at each side thereof, said flanges being adapted toreceive securing means for holding said members in assembled position,said troughs forming a cylindrical passage adapted to receive and clampa cable, said members also having laterally extending portions at oneend forming a concave frusto-conical surface when said members are,4assembled, and an annular member having a convex frustoconical surfaceopposite the said surface, and means for securing said member to saidlaterally projecting portions, the individual strands of Isaid cablebeing clamped between said frusto-conical surfaces.

4. A clamp for a hollow cable having flexible members passingtherethrough comprising a plurality of members adapted to be securedtogether, each having a semi-tubular portion with helical grooves on itsinterior surface adapted to fit and engage the side of a. twisted wirecable, said semi-tubu lar portions, when the members are securedtogether, forming a substantially cylindrical passage in said cable,each portion having a later-ally projecting flange having grooves in itsouter faces, said grooves being adapted to receive the separate anddiverging strands of said cable, and an annular member disposed oppositeto said flanges Iand having grooves therein adapted to receive saidseparate and diverging strands, and means for Clamping A said lattermember to said flange-s to clamp said strands therebetween whereby saidfiexible members may pass through the clamp and through the said annularmember.

5. A device for clamping a Cable having a plurality of flexible membersextending therethrough comprising a plurality of semitubular membersadapted to lit against said cable, means for securingr said memberstogether to clamp said cable, each of said members having a laterallyextending flange, said flanges adapted to form a substantially annularsurface, an annular member disposed opposite said surface, and means forsecuring said annular member to said flanges to elaine the separate anddirerging trends of the cable thereto, said flexible member passingthrough the last mentioned member, and a bail projecting from said lastmentioned member.

6. A clamp for a cable having in Combination, a plurality of membersadapted to be secured. together and to Co-operate to embrace the sidesof. a cable and to clamp the same, and means abutting` the ends of saidmembers to clamp the individual strands of said cable between said meansand the ends of said members.

In testimonj.7 whereof l aiiX my signature.

FRANK lV. GRISVVOLD.

